Retinoscope

Retinoscopy is performed when examining a patient to determine the degree of myopia (nearsightedness), hypermetropia (farsightedness) or astigmatism. During retinoscopy, the position and shape of the posterior pole of the cornea is determined, as well as the symmetry of the location of its anterior and posterior surfaces. Refractometry (determining the refractive power of the eye) allows us to identify differences in the refractive power of the cornea in different meridians of the eye.

The retinoscopic installation includes:

– illuminator (lamp or lantern);
– telescope (retinoscope);
– a table for fixing the patient’s head;
– a table with a hole to direct a beam of light into the eye.

Before starting the study, the doctor checks how clearly and clearly the image is reflected in the patient’s eye. If the image is unclear, the doctor will reposition the retinoscope's eyepiece and/or condenser.

During the examination, the doctor monitors the position and shape of the posterior pole of the cornea. He also evaluates the symmetry of the location of the anterior and posterior surfaces of the cornea and the shape of the pupil. The doctor will determine whether there is glare or spots on the pupil, which may indicate the presence of cataracts or other eye diseases.

Depending on the results of the study, the doctor may recommend additional diagnostic methods, such as skiascopy, ophthalmoscopy or other methods, to get a more complete picture of the condition of the eyeball and determine the necessary treatment.

How does a retinoscope work? The device detects the presence of vision problems by the reflection of transmitted light. To do this, it is directed directly into the patient's eye. During the procedure, the doctor evaluates exactly how the light reflection lines of the fundus move. The appearance of amblyopia is explained by the fact that a patient with this disease may not be able to perceive objects that are close. Or, conversely, cannot see distant objects. Ret

Retinoscopes:

It is an optical device for studying the refractive system of the eye by examining the reflected beam on the back surface of the iris. The instrument may be a single lens, in which a concentrated stream of light is often accompanied by scot (devices that allow image clarity to be improved without changing the scale or position of objects, usually using electronics), and devices used for direct transmission using prisms and mirrors. Is the ophthalmologist's most common diagnostic tool that can be used to collect superficial and deep images of the cornea; The depth of the image corresponds to the focal length of the retinoscope. Operating principle: To obtain an image of the internal section of the eyeball, it was proposed to use prisms, which, by deflecting the incident beam

Retinoscopes in ophthalmology

To carry out refractometry, special ophthalmological devices are used - stereoretinoscopes. It differs from a refractor in that: - a person looks at the same point on the retina where the light falls. It is possible to accurately find this point. At the moment, the most accurate device is automatic - there is a diopter scale that allows you to measure how much it is in diopters